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- W2040373367 abstract "The most widespread methods of anomaly detection in hyperspectral imagery (HSI) are the RX algorithm and its variants (e.g. Subspace RX). RX is optimal for any unimodal elliptically contoured distribution (ECD), and in certain data sets, it misinterprets any deviations from this model as true anomalies. Singleton outliers are by definition anomalous, but other RX detections can arise from less severe departures from the ECD, in the form of spectral prominences. We describe a method that mitigates such persistent false alarms by augmenting RX in a recursive process with truncated versions of the Adaptive Cosine Estimator (ACE). ACE is applied to RX exceedances that arise from prominences, bulges appearing in the whitened clutter distribution that indicate anisotropy. The ACE-augmented RX decision surface resembles a sea urchin." @default.
- W2040373367 created "2016-06-24" @default.
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- W2040373367 date "2010-04-23" @default.
- W2040373367 modified "2023-09-23" @default.
- W2040373367 title "Urchin: an RX-derivative accounting for anisotropies in whitened clutter" @default.
- W2040373367 doi "https://doi.org/10.1117/12.850222" @default.
- W2040373367 hasPublicationYear "2010" @default.
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